Now, Chi mag is expected to publish snaps of K-Middy wearing a bikini and showing off her blossoming baby bump while on the Caribbean island of Mustique with Wills.

It is thought the fresh batch of images were taken by a long-lens camera, as the island is a strictly private holiday destination, withPippa Middletonalso wearing very little.

St James' Palace has since issued a statement regarding the new images, claiming: "We are disappointed that photographs of the Duke and Duchess on a private holiday look likely to be published overseas. This is a clear breach of the couple's right to privacy."

According to Sky News, Australian magazine Woman's Day has also threatened to publish the pregnant pics of Kate, with its editor reportedly claiming the photos were taken by a member of the public.